MV-YJV-6-10kV
6/10 kV Medium Voltage Cable — Screened MV YJV to IEC 60502-2
Three-layer screened construction at 6/10 kV: the default primary distribution cable for industrial plants and utility feeders.
This is the cable most industrial networks meet their utility at. A three-core 6/10 kV build with Class 2 compacted copper, triple-extruded conductor screen, XLPE insulation and insulation screen, then a metallic screen per core, laid up with fillers under a PVC bedding and oversheath. Voltcore manufactures the three inner layers in one continuous pass so no contamination can be trapped at either semiconductive interface, which is the mechanism behind most premature insulation breakdown.
Because the screens are extruded rather than taped, the electric field stays purely radial and the onset of electrical treeing is pushed out to far higher stress. We record partial discharge on every production length at 1.5 U0 and keep results below 10 pC, and we issue the screen construction — copper tape thickness or copper wire count and size — so the protective device study can be completed before the drum is dispatched.
Specification
| Item | Value |
|---|---|
| Rated voltage U0/U (Um) | 6/10 (12) kV |
| Conductor | Class 2 stranded compacted copper, IEC 60228 |
| Core count | 1 and 3 core (3-core sizes 25 - 400 mm²) |
| Insulation thickness | 3.4 mm nominal |
| Conductor screen | Extruded cross-linked semiconductive compound, bonded, approx. 0.8 mm |
| Insulation screen | Extruded cross-linked semiconductive compound, strippable or bonded, approx. 0.8 mm |
| Metallic screen | Copper tape min. 0.10 mm, or copper wires with counter-helix copper tape, 16 - 50 mm² |
| Laying-up | Screened cores cabled with polypropylene fillers and binder tape |
| Oversheath | PVC type ST2, black, or flame-retardant PVC |
| Max conductor temperature, continuous | 90 °C |
| Max conductor temperature, short circuit (5 s) | 250 °C |
| Partial discharge level | Below 10 pC at 1.5 U0 as routine test per length |
| Minimum bending radius | 15 × overall diameter, multi-core |
| Test voltage at 50 Hz | 21 kV AC, 5 min (or 30 kV DC equivalent on request) |
Layer-by-layer construction
Listed from the conductor outward. Read this alongside the specification table — the two together tell you whether the cable will survive its installation method.
- 1. ConductorStranded and compacted annealed copper to IEC 60228 Class 2, with a smooth surface so the screen below holds uniform thickness
- 2. Conductor screenExtruded cross-linked semiconductive layer applied over the conductor to remove wire-to-wire air voids and cap electric stress peaks
- 3. InsulationXLPE applied in the same triple-extrusion head, 3.4 mm nominal, cured under nitrogen to keep water out of the treeing initiation sites
- 4. Insulation screenExtruded cross-linked semiconductive layer over the insulation, supplied strippable or bonded depending on the jointing system
- 5. Metallic screenCopper tape helically applied, or concentric copper wires with a counter-helix copper tape, sized to the specified earth-fault duty
- 6. Assembly and oversheathScreened cores laid up with polypropylene fillers and a binder tape, then PVC bedding and a black PVC type ST2 oversheath
Reference dimensions and weights
| Nominal cross-section (mm²) | Conductor structure (no./mm) | Insulation thickness (mm) | Metallic screen (mm²) | Approx. overall diameter (mm) | Approx. net weight (kg/km) |
|---|---|---|---|---|---|
| 3×25 | 7/2.14 | 3.4 | 16 | 43.5 | 2750 |
| 3×35 | 7/2.52 | 3.4 | 16 | 46.5 | 3200 |
| 3×50 | 19/1.78 | 3.4 | 16 | 49.3 | 3720 |
| 3×70 | 19/2.14 | 3.4 | 16 | 53.0 | 4520 |
| 3×95 | 19/2.52 | 3.4 | 16 | 56.8 | 5540 |
| 3×120 | 37/2.03 | 3.4 | 25 | 60.1 | 6430 |
| 3×150 | 37/2.25 | 3.4 | 25 | 63.8 | 7440 |
| 3×185 | 37/2.52 | 3.4 | 25 | 67.9 | 8760 |
| 3×240 | 37/2.85 | 3.4 | 25 | 73.8 | 10800 |
| 3×300 | 61/2.52 | 3.4 | 25 | 79.0 | 12700 |
Reference figures for preliminary sizing and drum planning. Overall diameter and weight vary with strand construction and sheath thickness tolerance; certified drawings are issued with each quotation.
Engineering characteristics
- Triple simultaneous extrusion of conductor screen, XLPE and insulation screen eliminates interfacial contamination and voids in one operation.
- Partial discharge recorded below 10 pC at 1.5 U0 as a routine test on every production length, not just on type-test samples.
- Metallic screen cross-section stated per size from 16 mm² upward so earth-fault calculations can be closed before manufacture.
- 90 °C continuous and 250 °C short-circuit conductor ratings, with 3.4 mm insulation verified by routine high-voltage withstand at 21 kV.
- Strippable insulation screen offered to reduce termination time, or bonded semiconductive layer where a qualified heat-shrink system is used.
- Compacted Class 2 conductor gives a smooth interface that prevents screen indentation into the insulation during thermal cycling.
- Optional water-blocking semiconductive tapes restrict tree growth on routes classified as permanently wet.
Typical applications
- Primary distribution from substation transformers to plant MV switchboards
- Feeders to large motors, pumps and compressors in process industries
- Ring main units and secondary distribution in industrial parks
- Wind farm and solar park collector feeders at 10 kV collection voltage
- Underground distribution networks for utilities and municipalities
- Backup generator and standby supply connections at MV level
Ordering options
- Metallic screen as copper tape, copper wires, or lead sheath for damp routes
- Tree-retardant XLPE (TR-XLPE) where long-term wet ageing is a concern
- Water-blocking tapes under both screens and under the oversheath
- 12/20 kV insulation construction on the same screening line
- Halogen-free oversheath and LSZH bedding for tunnels and buildings
Standards manufactured to
- IEC 60502-2
- GB/T 12706.2
- IEC 60228 (conductor)
- IEC 60885-3 (partial discharge measurement)
- IEC 60332-1-2 (flame propagation)
- IEC 60811 (insulation and sheath material tests)
Manufactured to other standards on request. Send the standard number with your RFQ and we will quote against it rather than against a near-equivalent.
Price and availability for YJV 6/10 kV Medium Voltage XLPE Power Cable
Include cross-section, core count, voltage grade, route length and installation method — those five determine price more than anything else on the page.
- Engineer-reviewed before pricing
- Reference drawings issued with the quotation
- Free sample up to free sample up to 5 m
YJV 6/10 kV Medium Voltage XLPE Power Cable — frequently asked questions
Why does MV cable need a conductor screen when LV cable does not?
At 6 kV the field strength next to each strand of a stranded conductor becomes high enough to ionise small air gaps and start partial discharge. The extruded semiconductive screen fills those gaps and creates a smooth equipotential surface, so the field across the insulation is uniform. Low-voltage cable has no such problem at 1 kV and therefore omits both screens.
Do I need copper tape or copper wire for the metallic screen?
Copper tape suits most three-core distribution work at moderate fault levels and costs less. Copper wires with a counter-helix tape give higher fault-current capacity and better flexibility, so they are preferred where earth-fault levels exceed roughly 13 kA for one second. Send the busbar fault level and clearing time and we will size it.
What is the difference between 6/6 kV and 6/10 kV cable?
Both use 3.4 mm XLPE insulation and often share dimensions. The distinction is how long the cable tolerates a single earth fault: 6/6 kV assumes the faulted phase is cleared promptly, while 6/10 kV tolerates earth-fault voltages for longer because U0 is higher relative to U. Choose from your network earthing and protection philosophy, not from catalogue availability.
Can this cable be buried without armour?
Yes where the route is protected by duct or the trench is free of sharp rock, but many utilities mandate armoured MV for open-ground burial. Voltcore supplies 6/10 kV YJV22 with steel tape armour using the same screened cores, which removes the ambiguity at almost no change to the electrical design.
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